He is best known as the lead vocalist and rhythm guitarist of thrash metal band Kreator,[2] which he started playing in as Tyrant in 1982 and renamed into Tormentor in 1984.

Petrozza also shared lead vocals in union with Tomas Lindberg for the track "Dirty Coloured Knife" on the self-titled 2002 album from Israeli metal act Nail Within.

[3] In 1994, he played guitar in the metal all-star band Voodoocult, amongst such artists as Dave Lombardo of Slayer and Chuck Schuldiner of Death.

Petrozza and drummer Stefan Schwarzmann played for the recording of the 2012 album Revolution by Lacrimosa.

He and his wife regularly contributed to the vegan magazine Kochen ohne Knochen, run by Joachim Hiller.